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- W2035005812 abstract "3-C-(Acetamidomethyl)-1,2-O-isopropylidene-β-l-threofuranose (4) and the 3-acetate (5) have been prepared in high yields from mono-O-isopropylidene-d-apiose [3-C-(hydroxymethyl)-1,2-O-isopropylidene-β-l-threofuranose] (1). Acid-catalyzed methanolysis of 4 caused migration of the isopropylidene group and the formation of methyl 4-acetamido-4-deoxy-3-C-(hydroxymethyl)-2,3-O-isopropylidene-β-d-erythrofuranoside (8) in 25% yield. The major product (45%) from the acetolysis of 4 was also a pyrrolidine derivative, namely, 4-acetamido-3-C-(acetoxymethyl)-1-O-acetyl-4-deoxy-2,3-O-isopropylidene-β-d-erythrofuranose (10). Acetolysis of 5 removed the isopropylidene group and gave four acetylated pyrrolidines (isomeric at C-1 and C-2). Conditions which resulted in minimal epimerization at C-2 were established, and the major isomers 12 and 13 were isolated in reasonable yields. 1H- and 13C-n.m.r. data for equilibrium solutions of the pyrrolidines, and for intermediates 1-5, are given." @default.
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- W2035005812 date "1975-12-01" @default.
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- W2035005812 title "Synthesis of branched-chain, pyrrolidino-sugar derivatives related to apiose" @default.
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- W2035005812 doi "https://doi.org/10.1016/s0008-6215(00)85869-3" @default.
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